Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Ethylenically unsaturated reactant admixed with either...
Patent
1987-06-22
1988-09-13
Nielsen, Earl
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Ethylenically unsaturated reactant admixed with either...
523510, 523511, 527400, C08H 502, C08G 6352
Patent
active
047711019
ABSTRACT:
Colored unsaturated polyesters having copolymerized therein lignin and lignin derivatives which condense during polymerization into the polyester chain are disclosed. The lignin moieties are thermally stable at the polymer processing temperature and are nonextractable from the polymer making these colored polyesters suitable for use in bathroom fixtures, boats, certain automotive applications and the like.
REFERENCES:
patent: 2209289 (1940-07-01), Wallace
patent: 3503762 (1970-03-01), Remer
patent: 4102944 (1978-07-01), Fukuyama et al.
patent: 4279788 (1981-07-01), Lambuth
Hilbert Samuel D.
Hyatt John A.
Pruett Wayne P.
Eastman Kodak Company
Heath, Jr. William P.
Nielsen Earl
Stevens John F.
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